/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:34:23,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:34:23,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:34:23,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:34:23,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:34:23,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:34:23,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:34:23,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:34:23,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:34:23,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:34:23,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:34:23,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:34:23,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:34:23,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:34:23,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:34:23,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:34:23,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:34:23,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:34:23,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:34:23,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:34:23,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:34:23,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:34:23,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:34:23,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:34:23,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:34:23,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:34:23,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:34:23,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:34:23,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:34:23,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:34:23,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:34:23,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:34:23,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:34:23,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:34:23,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:34:23,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:34:23,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:34:23,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:34:23,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:34:23,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:34:23,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:34:23,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 03:34:24,015 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:34:24,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:34:24,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:34:24,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:34:24,021 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:34:24,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:34:24,021 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:34:24,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:34:24,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:34:24,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:34:24,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:34:24,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:34:24,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:34:24,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:34:24,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:34:24,024 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:34:24,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:34:24,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:34:24,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:34:24,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:34:24,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:34:24,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:34:24,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:34:24,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:34:24,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:34:24,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:34:24,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:34:24,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:34:24,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:34:24,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:34:24,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:34:24,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:34:24,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:34:24,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:34:24,489 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:34:24,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-29 03:34:24,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/534345eea/c959302db4c046a9aea4658cc4cf9d55/FLAG537b7d34f [2020-10-29 03:34:25,295 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:34:25,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-29 03:34:25,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/534345eea/c959302db4c046a9aea4658cc4cf9d55/FLAG537b7d34f [2020-10-29 03:34:25,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/534345eea/c959302db4c046a9aea4658cc4cf9d55 [2020-10-29 03:34:25,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:34:25,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:34:25,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:34:25,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:34:25,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:34:25,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:34:25" (1/1) ... [2020-10-29 03:34:25,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c25aa6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25, skipping insertion in model container [2020-10-29 03:34:25,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:34:25" (1/1) ... [2020-10-29 03:34:25,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:34:25,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:34:25,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:34:25,893 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:34:25,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:34:25,970 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:34:25,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25 WrapperNode [2020-10-29 03:34:25,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:34:25,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:34:25,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:34:25,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:34:25,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25" (1/1) ... [2020-10-29 03:34:25,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25" (1/1) ... [2020-10-29 03:34:26,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25" (1/1) ... [2020-10-29 03:34:26,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25" (1/1) ... [2020-10-29 03:34:26,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25" (1/1) ... [2020-10-29 03:34:26,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25" (1/1) ... [2020-10-29 03:34:26,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25" (1/1) ... [2020-10-29 03:34:26,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:34:26,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:34:26,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:34:26,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:34:26,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:34:26,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:34:26,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:34:26,183 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:34:26,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:34:26,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:34:26,184 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:34:26,184 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:34:26,184 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 03:34:26,185 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 03:34:26,185 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:34:26,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:34:26,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:34:26,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:34:26,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:34:26,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:34:26,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:34:26,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:34:26,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:34:26,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:34:26,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:34:26,764 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:34:26,765 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-29 03:34:26,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:34:26 BoogieIcfgContainer [2020-10-29 03:34:26,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:34:26,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:34:26,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:34:26,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:34:26,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:34:25" (1/3) ... [2020-10-29 03:34:26,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f9c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:34:26, skipping insertion in model container [2020-10-29 03:34:26,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:34:25" (2/3) ... [2020-10-29 03:34:26,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f9c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:34:26, skipping insertion in model container [2020-10-29 03:34:26,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:34:26" (3/3) ... [2020-10-29 03:34:26,780 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2020-10-29 03:34:26,795 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:34:26,801 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:34:26,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:34:26,845 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:34:26,846 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:34:26,846 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:34:26,846 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:34:26,846 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:34:26,846 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:34:26,847 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:34:26,847 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:34:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-29 03:34:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 03:34:26,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:26,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:26,871 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:26,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2093384956, now seen corresponding path program 1 times [2020-10-29 03:34:26,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:26,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660955943] [2020-10-29 03:34:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:27,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:27,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:27,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:27,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:27,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 03:34:27,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:34:27,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-29 03:34:27,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:27,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:34:27,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 03:34:27,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:34:27,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 03:34:27,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:27,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:27,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:27,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:27,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:27,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:34:27,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:27,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:27,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:27,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:34:27,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660955943] [2020-10-29 03:34:27,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:34:27,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 03:34:27,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932683478] [2020-10-29 03:34:27,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 03:34:27,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 03:34:27,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:34:27,602 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-10-29 03:34:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:27,787 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2020-10-29 03:34:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 03:34:27,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 03:34:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:27,796 INFO L225 Difference]: With dead ends: 71 [2020-10-29 03:34:27,797 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 03:34:27,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:34:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 03:34:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-29 03:34:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 03:34:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-29 03:34:27,845 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2020-10-29 03:34:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:27,846 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-29 03:34:27,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 03:34:27,846 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-29 03:34:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 03:34:27,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:27,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:27,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:34:27,848 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1785823484, now seen corresponding path program 1 times [2020-10-29 03:34:27,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:27,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641071852] [2020-10-29 03:34:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:27,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:27,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:27,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:28,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:30,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:30,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 03:34:30,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:34:30,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2467 [2020-10-29 03:34:30,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:30,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:34:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:34:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 03:34:30,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:31,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:31,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:31,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:31,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:31,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:31,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:34:31,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:31,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:31,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:31,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:31,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:31,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:34:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:34:31,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641071852] [2020-10-29 03:34:31,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:31,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:34:31,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985463840] [2020-10-29 03:34:31,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:34:31,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:31,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:34:31,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:34:31,057 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 15 states. [2020-10-29 03:34:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:31,792 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-29 03:34:31,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:34:31,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-29 03:34:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:31,797 INFO L225 Difference]: With dead ends: 61 [2020-10-29 03:34:31,797 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 03:34:31,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:34:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 03:34:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2020-10-29 03:34:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 03:34:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-29 03:34:31,816 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 27 [2020-10-29 03:34:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:31,816 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-29 03:34:31,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:34:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-29 03:34:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:34:31,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:31,818 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:31,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:34:31,819 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:31,819 INFO L82 PathProgramCache]: Analyzing trace with hash -63978048, now seen corresponding path program 2 times [2020-10-29 03:34:31,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:31,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346633926] [2020-10-29 03:34:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:31,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:31,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:31,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:32,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:35,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:35,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 03:34:35,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:34:35,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3701 [2020-10-29 03:34:35,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:35,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:35,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:34:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:34:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:34:35,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:36,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:36,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:36,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:36,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:36,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:36,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 03:34:36,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:36,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:36,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:34:36,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346633926] [2020-10-29 03:34:36,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:36,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:34:36,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496251322] [2020-10-29 03:34:36,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:34:36,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:36,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:34:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:34:36,419 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 16 states. [2020-10-29 03:34:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:37,491 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-29 03:34:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:34:37,492 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-29 03:34:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:37,495 INFO L225 Difference]: With dead ends: 74 [2020-10-29 03:34:37,495 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 03:34:37,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:34:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 03:34:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-10-29 03:34:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 03:34:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-29 03:34:37,508 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 31 [2020-10-29 03:34:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:37,508 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-29 03:34:37,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:34:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-29 03:34:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 03:34:37,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:37,511 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:37,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:34:37,512 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:37,513 INFO L82 PathProgramCache]: Analyzing trace with hash -349384226, now seen corresponding path program 3 times [2020-10-29 03:34:37,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:37,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628807439] [2020-10-29 03:34:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:37,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:37,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:37,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:38,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:41,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:41,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:34:41,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:34:41,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3658 [2020-10-29 03:34:41,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:41,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:41,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:34:41,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:34:41,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:34:41,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:42,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:42,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:42,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:42,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:42,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:42,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:34:42,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:42,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:42,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:42,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:42,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:42,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:34:42,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628807439] [2020-10-29 03:34:42,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:42,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:34:42,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487687082] [2020-10-29 03:34:42,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:34:42,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:42,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:34:42,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:34:42,302 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 17 states. [2020-10-29 03:34:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:43,753 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-29 03:34:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:34:43,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-29 03:34:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:43,756 INFO L225 Difference]: With dead ends: 78 [2020-10-29 03:34:43,756 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 03:34:43,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:34:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 03:34:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2020-10-29 03:34:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:34:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-29 03:34:43,772 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 33 [2020-10-29 03:34:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:43,773 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-29 03:34:43,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:34:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-29 03:34:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 03:34:43,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:43,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:43,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:34:43,775 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:43,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:43,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1468170402, now seen corresponding path program 1 times [2020-10-29 03:34:43,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:43,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934269490] [2020-10-29 03:34:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:43,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:43,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:45,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:45,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 03:34:45,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:34:45,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1417 [2020-10-29 03:34:45,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:45,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:34:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 03:34:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 03:34:45,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:34:45,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:45,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:45,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:45,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:45,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:45,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:34:45,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:45,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:45,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:45,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:45,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:45,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:34:45,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 03:34:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:45,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:45,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:45,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:34:45,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:45,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:34:45,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:45,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:45,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:34:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:45,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:34:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:34:45,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934269490] [2020-10-29 03:34:45,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:45,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 03:34:45,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535100975] [2020-10-29 03:34:45,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:34:45,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:34:45,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:34:45,285 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2020-10-29 03:34:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:45,437 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-10-29 03:34:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 03:34:45,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-29 03:34:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:45,440 INFO L225 Difference]: With dead ends: 90 [2020-10-29 03:34:45,440 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 03:34:45,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:34:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 03:34:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-29 03:34:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 03:34:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-29 03:34:45,455 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 35 [2020-10-29 03:34:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:45,455 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-29 03:34:45,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:34:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-29 03:34:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:34:45,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:45,457 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:45,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:34:45,458 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:45,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1651275272, now seen corresponding path program 4 times [2020-10-29 03:34:45,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:45,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569637453] [2020-10-29 03:34:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:45,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:45,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:45,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:45,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:46,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:50,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:50,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:34:50,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:34:50,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:34:50,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:50,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:50,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:34:50,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:34:50,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:34:50,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:51,230 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2020-10-29 03:34:52,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:34:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:52,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:52,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:34:52,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:34:52,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:34:52,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:52,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:34:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:34:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:34:52,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:34:52,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569637453] [2020-10-29 03:34:52,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:34:52,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:34:52,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63756473] [2020-10-29 03:34:52,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:34:52,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:34:52,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:34:52,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:34:52,246 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 21 states. [2020-10-29 03:34:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:34:54,247 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-29 03:34:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:34:54,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-29 03:34:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:34:54,250 INFO L225 Difference]: With dead ends: 83 [2020-10-29 03:34:54,250 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 03:34:54,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:34:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 03:34:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2020-10-29 03:34:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 03:34:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-29 03:34:54,264 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 39 [2020-10-29 03:34:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:34:54,265 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-29 03:34:54,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:34:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-29 03:34:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:34:54,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:34:54,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:34:54,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:34:54,267 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:34:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:34:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1544984824, now seen corresponding path program 2 times [2020-10-29 03:34:54,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:34:54,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920288965] [2020-10-29 03:34:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:34:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:34:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:54,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:54,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:54,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:55,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:56,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:34:59,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:34:59,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:34:59,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:34:59,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:34:59,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:34:59,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:34:59,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:34:59,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:34:59,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 03:34:59,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:34:59,946 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-10-29 03:35:00,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:35:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:00,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:00,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:00,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:35:00,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:00,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:35:00,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:00,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:00,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:00,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 03:35:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:00,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:00,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:00,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:35:00,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:00,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:35:00,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:00,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:00,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:35:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:35:00,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:35:00,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920288965] [2020-10-29 03:35:00,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:35:00,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:35:00,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52794463] [2020-10-29 03:35:00,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:35:00,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:35:00,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:35:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:35:00,498 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 19 states. [2020-10-29 03:35:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:35:01,881 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-10-29 03:35:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:35:01,882 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-29 03:35:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:35:01,884 INFO L225 Difference]: With dead ends: 86 [2020-10-29 03:35:01,884 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 03:35:01,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:35:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 03:35:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-29 03:35:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 03:35:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2020-10-29 03:35:01,906 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 41 [2020-10-29 03:35:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:35:01,906 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2020-10-29 03:35:01,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:35:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2020-10-29 03:35:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:35:01,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:35:01,909 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:35:01,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:35:01,909 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:35:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:35:01,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1028626410, now seen corresponding path program 5 times [2020-10-29 03:35:01,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:35:01,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821596729] [2020-10-29 03:35:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:35:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:01,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:01,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:01,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:01,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:03,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:06,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:06,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:35:06,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:35:06,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:35:06,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:06,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:06,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 03:35:06,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:35:06,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 03:35:06,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:07,456 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 39 [2020-10-29 03:35:08,189 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-29 03:35:08,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:35:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:08,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:08,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:08,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:35:08,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:08,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:35:08,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:08,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:08,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:08,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:08,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:08,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:35:08,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821596729] [2020-10-29 03:35:08,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:35:08,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:35:08,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152065779] [2020-10-29 03:35:08,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:35:08,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:35:08,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:35:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:35:08,968 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 22 states. [2020-10-29 03:35:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:35:10,648 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-10-29 03:35:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:35:10,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2020-10-29 03:35:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:35:10,650 INFO L225 Difference]: With dead ends: 98 [2020-10-29 03:35:10,650 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 03:35:10,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:35:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 03:35:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2020-10-29 03:35:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 03:35:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-29 03:35:10,670 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 41 [2020-10-29 03:35:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:35:10,670 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-29 03:35:10,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:35:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-29 03:35:10,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:35:10,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:35:10,672 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:35:10,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:35:10,673 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:35:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:35:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash 336475828, now seen corresponding path program 6 times [2020-10-29 03:35:10,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:35:10,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944994656] [2020-10-29 03:35:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:35:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:10,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:10,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:10,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:10,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:11,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:15,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:15,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:35:15,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:35:15,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 03:35:15,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:15,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 03:35:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:35:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 03:35:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:15,994 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-10-29 03:35:16,135 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2020-10-29 03:35:16,319 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-29 03:35:16,450 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-29 03:35:17,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:35:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:17,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:17,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:17,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:35:17,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:17,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:35:17,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:17,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:17,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:17,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:17,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:17,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:35:17,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944994656] [2020-10-29 03:35:17,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:35:17,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:35:17,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858092251] [2020-10-29 03:35:17,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:35:17,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:35:17,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:35:17,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:35:17,213 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 23 states. [2020-10-29 03:35:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:35:18,777 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2020-10-29 03:35:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:35:18,780 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-10-29 03:35:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:35:18,782 INFO L225 Difference]: With dead ends: 111 [2020-10-29 03:35:18,782 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 03:35:18,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:35:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 03:35:18,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2020-10-29 03:35:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 03:35:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-29 03:35:18,799 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 43 [2020-10-29 03:35:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:35:18,799 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-29 03:35:18,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:35:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-29 03:35:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:35:18,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:35:18,801 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:35:18,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:35:18,802 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:35:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:35:18,802 INFO L82 PathProgramCache]: Analyzing trace with hash 513345204, now seen corresponding path program 3 times [2020-10-29 03:35:18,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:35:18,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223240043] [2020-10-29 03:35:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:35:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:18,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:18,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:18,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:18,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:20,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:23,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:23,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:35:23,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:35:23,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 03:35:23,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:23,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:35:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:35:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 03:35:23,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:25,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:35:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:25,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:25,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:25,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:35:25,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:25,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:35:25,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:25,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:25,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:25,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:25,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:25,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:25,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 03:35:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:25,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:25,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:25,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:35:25,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:25,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:35:25,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:25,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:25,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:35:25,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:25,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:35:25,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:35:25,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223240043] [2020-10-29 03:35:25,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:35:25,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:35:25,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078466442] [2020-10-29 03:35:25,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:35:25,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:35:25,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:35:25,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:35:25,105 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 22 states. [2020-10-29 03:35:26,791 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-29 03:35:27,279 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-29 03:35:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:35:27,586 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2020-10-29 03:35:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:35:27,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-29 03:35:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:35:27,589 INFO L225 Difference]: With dead ends: 113 [2020-10-29 03:35:27,589 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 03:35:27,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:35:27,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 03:35:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 72. [2020-10-29 03:35:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 03:35:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-29 03:35:27,627 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 45 [2020-10-29 03:35:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:35:27,627 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-29 03:35:27,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:35:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-29 03:35:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:35:27,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:35:27,632 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:35:27,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:35:27,632 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:35:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:35:27,633 INFO L82 PathProgramCache]: Analyzing trace with hash -653109678, now seen corresponding path program 4 times [2020-10-29 03:35:27,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:35:27,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229292464] [2020-10-29 03:35:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:35:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:27,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:27,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:27,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:27,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:29,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:30,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:32,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:32,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:35:32,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:35:32,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:35:32,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:32,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:32,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 03:35:32,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:35:32,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 03:35:32,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:33,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:35:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:33,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:33,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:33,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:35:33,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:33,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:35:33,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:33,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:33,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:33,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:33,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:33,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:33,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-29 03:35:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:33,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:33,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:33,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:35:33,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:33,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:35:33,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:33,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:35:33,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:33,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:35:33,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:35:33,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229292464] [2020-10-29 03:35:33,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:35:33,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:35:33,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678273118] [2020-10-29 03:35:33,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:35:33,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:35:33,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:35:33,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:35:33,815 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 21 states. [2020-10-29 03:35:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:35:35,947 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-10-29 03:35:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:35:35,948 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-29 03:35:35,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:35:35,950 INFO L225 Difference]: With dead ends: 115 [2020-10-29 03:35:35,950 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 03:35:35,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=378, Invalid=1262, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:35:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 03:35:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-10-29 03:35:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 03:35:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-10-29 03:35:35,971 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 47 [2020-10-29 03:35:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:35:35,971 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-10-29 03:35:35,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:35:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-10-29 03:35:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 03:35:35,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:35:35,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:35:35,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:35:35,973 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:35:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:35:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1729520978, now seen corresponding path program 5 times [2020-10-29 03:35:35,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:35:35,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142852146] [2020-10-29 03:35:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:35:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:35,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:35,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:36,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:36,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:38,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:38,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 03:35:38,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:35:38,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2594 [2020-10-29 03:35:38,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:38,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:35:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 03:35:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:35:38,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:38,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:35:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:38,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:38,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:35:38,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:38,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:35:38,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:38,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:38,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:38,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:38,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:38,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:38,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 03:35:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:38,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:38,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:38,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:35:38,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:38,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:35:38,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:38,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:35:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:38,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:38,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-29 03:35:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:38,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:38,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:38,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:35:38,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:38,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:35:38,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:38,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:35:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:38,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-29 03:35:38,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142852146] [2020-10-29 03:35:38,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:35:38,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:35:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727054757] [2020-10-29 03:35:38,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:35:38,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:35:38,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:35:38,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:35:38,641 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 6 states. [2020-10-29 03:35:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:35:38,791 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2020-10-29 03:35:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:35:38,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-29 03:35:38,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:35:38,795 INFO L225 Difference]: With dead ends: 148 [2020-10-29 03:35:38,795 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 03:35:38,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:35:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 03:35:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-29 03:35:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 03:35:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-29 03:35:38,817 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 49 [2020-10-29 03:35:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:35:38,818 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-29 03:35:38,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:35:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-29 03:35:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 03:35:38,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:35:38,820 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:35:38,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:35:38,820 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:35:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:35:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1884813036, now seen corresponding path program 7 times [2020-10-29 03:35:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:35:38,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142528311] [2020-10-29 03:35:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:35:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:38,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:38,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:38,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:38,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:43,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:43,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:35:43,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:35:43,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:35:43,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:43,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:35:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 03:35:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:35:43,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:43,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:35:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:43,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:43,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:43,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:35:43,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:43,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:35:43,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:43,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:43,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:43,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:43,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:43,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 03:35:43,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142528311] [2020-10-29 03:35:43,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:35:43,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:35:43,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405272805] [2020-10-29 03:35:43,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:35:43,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:35:43,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:35:44,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:35:44,000 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 13 states. [2020-10-29 03:35:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:35:44,298 INFO L93 Difference]: Finished difference Result 156 states and 190 transitions. [2020-10-29 03:35:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:35:44,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-29 03:35:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:35:44,299 INFO L225 Difference]: With dead ends: 156 [2020-10-29 03:35:44,299 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 03:35:44,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:35:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 03:35:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-29 03:35:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 03:35:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-29 03:35:44,327 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 51 [2020-10-29 03:35:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:35:44,327 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-29 03:35:44,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:35:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-29 03:35:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 03:35:44,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:35:44,331 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:35:44,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:35:44,331 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:35:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:35:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash -729804434, now seen corresponding path program 8 times [2020-10-29 03:35:44,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:35:44,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278595198] [2020-10-29 03:35:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:35:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:44,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:44,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:44,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:48,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:49,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:49,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 03:35:49,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:35:49,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-29 03:35:49,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:49,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:49,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:35:49,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-29 03:35:49,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:35:49,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:49,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:35:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:49,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:49,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:49,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:35:49,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:49,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:35:49,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:49,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:49,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:49,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:49,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:49,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:35:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-29 03:35:49,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278595198] [2020-10-29 03:35:49,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:35:49,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:35:49,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771491677] [2020-10-29 03:35:49,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:35:49,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:35:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:35:49,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:35:49,572 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 14 states. [2020-10-29 03:35:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:35:50,008 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2020-10-29 03:35:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:35:50,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-29 03:35:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:35:50,014 INFO L225 Difference]: With dead ends: 153 [2020-10-29 03:35:50,014 INFO L226 Difference]: Without dead ends: 96 [2020-10-29 03:35:50,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:35:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-29 03:35:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-10-29 03:35:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 03:35:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-29 03:35:50,058 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 81 [2020-10-29 03:35:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:35:50,058 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-29 03:35:50,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:35:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-29 03:35:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 03:35:50,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:35:50,061 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:35:50,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:35:50,061 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:35:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:35:50,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1580346760, now seen corresponding path program 9 times [2020-10-29 03:35:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:35:50,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319817989] [2020-10-29 03:35:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:35:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:50,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:50,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:50,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:54,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:55,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:55,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 03:35:55,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:35:55,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 03:35:55,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:55,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:55,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:35:55,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:35:55,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:35:55,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:55,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:35:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:55,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:55,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:35:55,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:35:55,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:35:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:35:55,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:35:55,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:35:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:35:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:35:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:35:55,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:35:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-29 03:35:55,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319817989] [2020-10-29 03:35:55,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:35:55,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:35:55,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964899625] [2020-10-29 03:35:55,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:35:55,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:35:55,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:35:55,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:35:55,334 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 15 states. [2020-10-29 03:35:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:35:55,766 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-10-29 03:35:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:35:55,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 87 [2020-10-29 03:35:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:35:55,768 INFO L225 Difference]: With dead ends: 163 [2020-10-29 03:35:55,768 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 03:35:55,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:35:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 03:35:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-10-29 03:35:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 03:35:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-29 03:35:55,801 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 87 [2020-10-29 03:35:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:35:55,801 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-29 03:35:55,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:35:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-29 03:35:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-29 03:35:55,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:35:55,802 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:35:55,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:35:55,803 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:35:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:35:55,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1333981662, now seen corresponding path program 10 times [2020-10-29 03:35:55,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:35:55,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250693400] [2020-10-29 03:35:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:35:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:35:55,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:55,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:35:55,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:00,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:00,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 03:36:00,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:00,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 03:36:00,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:00,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:00,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:36:00,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:36:00,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:36:00,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:01,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:01,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:01,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:01,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:01,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:01,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:36:01,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:01,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:01,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:01,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:01,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:01,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:36:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-29 03:36:01,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250693400] [2020-10-29 03:36:01,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:01,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:36:01,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866306841] [2020-10-29 03:36:01,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:36:01,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:01,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:36:01,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:36:01,060 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 16 states. [2020-10-29 03:36:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:01,460 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2020-10-29 03:36:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:36:01,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2020-10-29 03:36:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:01,461 INFO L225 Difference]: With dead ends: 173 [2020-10-29 03:36:01,461 INFO L226 Difference]: Without dead ends: 108 [2020-10-29 03:36:01,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:36:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-29 03:36:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-10-29 03:36:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 03:36:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-29 03:36:01,486 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 93 [2020-10-29 03:36:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:01,486 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-29 03:36:01,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:36:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-29 03:36:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 03:36:01,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:01,487 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:01,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:36:01,488 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:01,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1408455484, now seen corresponding path program 11 times [2020-10-29 03:36:01,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:01,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043205922] [2020-10-29 03:36:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:01,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:01,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:01,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:06,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:06,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 03:36:06,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:06,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-29 03:36:06,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:06,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:36:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:36:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:36:06,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:06,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:06,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:06,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:06,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:06,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:36:06,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:06,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:06,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:06,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:36:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-29 03:36:06,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043205922] [2020-10-29 03:36:06,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:06,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:36:06,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094768143] [2020-10-29 03:36:06,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:36:06,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:06,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:36:06,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:36:06,807 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 17 states. [2020-10-29 03:36:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:07,238 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2020-10-29 03:36:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:36:07,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 99 [2020-10-29 03:36:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:07,239 INFO L225 Difference]: With dead ends: 183 [2020-10-29 03:36:07,240 INFO L226 Difference]: Without dead ends: 114 [2020-10-29 03:36:07,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:36:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-29 03:36:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-10-29 03:36:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-29 03:36:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-29 03:36:07,279 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 99 [2020-10-29 03:36:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:07,280 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-29 03:36:07,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:36:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-29 03:36:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-29 03:36:07,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:07,282 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:07,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:36:07,282 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:07,283 INFO L82 PathProgramCache]: Analyzing trace with hash 380607702, now seen corresponding path program 12 times [2020-10-29 03:36:07,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:07,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610190201] [2020-10-29 03:36:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:07,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:07,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:12,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:12,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-29 03:36:12,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:12,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:36:12,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:12,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:36:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:36:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:36:12,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:12,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:12,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:12,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:12,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:12,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:12,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:36:12,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:12,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:12,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:12,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-29 03:36:12,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610190201] [2020-10-29 03:36:12,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:12,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:36:12,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433134301] [2020-10-29 03:36:12,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:36:12,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:36:12,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:36:12,574 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 18 states. [2020-10-29 03:36:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:13,005 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2020-10-29 03:36:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:36:13,006 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 105 [2020-10-29 03:36:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:13,007 INFO L225 Difference]: With dead ends: 193 [2020-10-29 03:36:13,008 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 03:36:13,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:36:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 03:36:13,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-29 03:36:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 03:36:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-29 03:36:13,034 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2020-10-29 03:36:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:13,034 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-29 03:36:13,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:36:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-29 03:36:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 03:36:13,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:13,036 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:13,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:36:13,036 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1179945712, now seen corresponding path program 13 times [2020-10-29 03:36:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:13,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542995723] [2020-10-29 03:36:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:13,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:13,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:13,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:18,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:18,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 03:36:18,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:18,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-29 03:36:18,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:18,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:18,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:36:18,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:36:18,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:36:18,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:18,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:18,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:18,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:18,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:18,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:18,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:36:18,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:18,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:18,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:18,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:18,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:18,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-29 03:36:18,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542995723] [2020-10-29 03:36:18,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:18,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:36:18,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562619111] [2020-10-29 03:36:18,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:36:18,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:18,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:36:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:36:18,372 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 19 states. [2020-10-29 03:36:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:18,831 INFO L93 Difference]: Finished difference Result 203 states and 212 transitions. [2020-10-29 03:36:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:36:18,832 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2020-10-29 03:36:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:18,833 INFO L225 Difference]: With dead ends: 203 [2020-10-29 03:36:18,833 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 03:36:18,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:36:18,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 03:36:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-10-29 03:36:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 03:36:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-10-29 03:36:18,864 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 111 [2020-10-29 03:36:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:18,864 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-10-29 03:36:18,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:36:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-10-29 03:36:18,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 03:36:18,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:18,867 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:18,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:36:18,867 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:18,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1779219850, now seen corresponding path program 14 times [2020-10-29 03:36:18,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:18,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770198407] [2020-10-29 03:36:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:18,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:18,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:18,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:23,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:23,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-29 03:36:23,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:23,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-29 03:36:23,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:23,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:36:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-29 03:36:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:36:23,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:24,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:24,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:24,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:24,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:24,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:24,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:36:24,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:24,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:24,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:24,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:24,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:24,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-29 03:36:24,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770198407] [2020-10-29 03:36:24,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:24,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:36:24,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593952560] [2020-10-29 03:36:24,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:36:24,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:36:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:36:24,230 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 20 states. [2020-10-29 03:36:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:24,674 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2020-10-29 03:36:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:36:24,675 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 117 [2020-10-29 03:36:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:24,676 INFO L225 Difference]: With dead ends: 213 [2020-10-29 03:36:24,676 INFO L226 Difference]: Without dead ends: 132 [2020-10-29 03:36:24,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:36:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-29 03:36:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-10-29 03:36:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 03:36:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-10-29 03:36:24,708 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2020-10-29 03:36:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:24,708 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-10-29 03:36:24,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:36:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-10-29 03:36:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 03:36:24,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:24,709 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:24,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:36:24,709 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2089473188, now seen corresponding path program 15 times [2020-10-29 03:36:24,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:24,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582421835] [2020-10-29 03:36:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:24,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:24,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:29,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:29,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-29 03:36:29,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:29,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-29 03:36:29,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:29,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:29,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:36:29,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:36:29,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:36:29,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:30,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:30,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:30,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:30,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:30,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:30,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:36:30,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:30,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:30,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:30,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:30,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:30,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:36:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-29 03:36:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582421835] [2020-10-29 03:36:30,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:30,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:36:30,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489643935] [2020-10-29 03:36:30,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:36:30,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:30,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:36:30,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:36:30,213 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 21 states. [2020-10-29 03:36:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:30,617 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2020-10-29 03:36:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:36:30,618 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 123 [2020-10-29 03:36:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:30,619 INFO L225 Difference]: With dead ends: 223 [2020-10-29 03:36:30,619 INFO L226 Difference]: Without dead ends: 138 [2020-10-29 03:36:30,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:36:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-29 03:36:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-10-29 03:36:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-29 03:36:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2020-10-29 03:36:30,650 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 123 [2020-10-29 03:36:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:30,650 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2020-10-29 03:36:30,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:36:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2020-10-29 03:36:30,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 03:36:30,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:30,651 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:30,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:36:30,651 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:30,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:30,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1509330882, now seen corresponding path program 16 times [2020-10-29 03:36:30,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:30,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600427695] [2020-10-29 03:36:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:30,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:30,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:35,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:35,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-29 03:36:35,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-29 03:36:35,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:35,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:36:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-29 03:36:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 03:36:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:36,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:36,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:36,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:36,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:36,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:36,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:36:36,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:36,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:36,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:36,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-29 03:36:36,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600427695] [2020-10-29 03:36:36,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:36,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:36:36,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610527086] [2020-10-29 03:36:36,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:36:36,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:36,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:36:36,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:36:36,137 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 22 states. [2020-10-29 03:36:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:36,637 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2020-10-29 03:36:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:36:36,639 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-10-29 03:36:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:36,641 INFO L225 Difference]: With dead ends: 233 [2020-10-29 03:36:36,641 INFO L226 Difference]: Without dead ends: 144 [2020-10-29 03:36:36,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:36:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-29 03:36:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-10-29 03:36:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-29 03:36:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2020-10-29 03:36:36,673 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 129 [2020-10-29 03:36:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:36,673 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2020-10-29 03:36:36,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:36:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2020-10-29 03:36:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-29 03:36:36,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:36,674 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:36,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:36:36,674 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:36,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1984639064, now seen corresponding path program 17 times [2020-10-29 03:36:36,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:36,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24655492] [2020-10-29 03:36:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:36,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:36,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:36,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:41,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:41,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-29 03:36:41,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:41,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-29 03:36:41,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:41,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:41,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:36:41,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:36:41,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:36:41,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:42,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:42,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:42,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:42,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:42,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:36:42,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:42,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:42,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:42,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:42,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:42,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-29 03:36:42,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24655492] [2020-10-29 03:36:42,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:42,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:36:42,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231667013] [2020-10-29 03:36:42,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:36:42,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:42,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:36:42,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:36:42,203 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand 23 states. [2020-10-29 03:36:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:42,741 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2020-10-29 03:36:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:36:42,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 135 [2020-10-29 03:36:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:42,742 INFO L225 Difference]: With dead ends: 243 [2020-10-29 03:36:42,742 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 03:36:42,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:36:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 03:36:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-29 03:36:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-29 03:36:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2020-10-29 03:36:42,777 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 135 [2020-10-29 03:36:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:42,777 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2020-10-29 03:36:42,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:36:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2020-10-29 03:36:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-29 03:36:42,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:42,778 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:42,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:36:42,779 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1634028302, now seen corresponding path program 18 times [2020-10-29 03:36:42,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:42,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46156090] [2020-10-29 03:36:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:42,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:42,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:42,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:47,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:47,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-29 03:36:47,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:47,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-29 03:36:47,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:47,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:47,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:36:47,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:36:47,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:36:47,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:48,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:48,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:48,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:48,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:48,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:48,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:36:48,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:48,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:48,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:48,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:48,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:48,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-29 03:36:48,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46156090] [2020-10-29 03:36:48,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:48,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:36:48,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17987173] [2020-10-29 03:36:48,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:36:48,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:48,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:36:48,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:36:48,326 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 24 states. [2020-10-29 03:36:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:48,919 INFO L93 Difference]: Finished difference Result 253 states and 262 transitions. [2020-10-29 03:36:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:36:48,920 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 141 [2020-10-29 03:36:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:48,922 INFO L225 Difference]: With dead ends: 253 [2020-10-29 03:36:48,922 INFO L226 Difference]: Without dead ends: 156 [2020-10-29 03:36:48,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:36:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-29 03:36:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-10-29 03:36:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-29 03:36:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2020-10-29 03:36:48,961 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 141 [2020-10-29 03:36:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:48,962 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2020-10-29 03:36:48,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:36:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2020-10-29 03:36:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-29 03:36:48,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:48,963 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:48,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:36:48,965 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash 734699020, now seen corresponding path program 19 times [2020-10-29 03:36:48,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:48,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186501382] [2020-10-29 03:36:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:48,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:49,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:49,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:54,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:54,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-29 03:36:54,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:36:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-29 03:36:54,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:54,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:36:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-29 03:36:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:36:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:54,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:36:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:54,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:36:54,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:36:54,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:36:54,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:36:54,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:36:54,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:36:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:36:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:36:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:36:54,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:36:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-29 03:36:54,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186501382] [2020-10-29 03:36:54,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:36:54,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:36:54,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632621898] [2020-10-29 03:36:54,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:36:54,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:36:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:36:54,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:36:54,582 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 25 states. [2020-10-29 03:36:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:36:55,173 INFO L93 Difference]: Finished difference Result 263 states and 272 transitions. [2020-10-29 03:36:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:36:55,173 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 147 [2020-10-29 03:36:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:36:55,176 INFO L225 Difference]: With dead ends: 263 [2020-10-29 03:36:55,176 INFO L226 Difference]: Without dead ends: 162 [2020-10-29 03:36:55,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:36:55,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-29 03:36:55,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-10-29 03:36:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-29 03:36:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2020-10-29 03:36:55,207 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 147 [2020-10-29 03:36:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:36:55,207 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2020-10-29 03:36:55,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:36:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2020-10-29 03:36:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-29 03:36:55,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:36:55,208 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:36:55,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:36:55,208 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:36:55,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:36:55,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1077250982, now seen corresponding path program 20 times [2020-10-29 03:36:55,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:36:55,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248840108] [2020-10-29 03:36:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:36:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:36:55,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:55,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:36:55,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:00,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:00,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-29 03:37:00,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-29 03:37:00,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:00,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:37:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:37:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 03:37:00,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:00,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:00,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-29 03:37:00,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248840108] [2020-10-29 03:37:00,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:37:00,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:37:00,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86996413] [2020-10-29 03:37:00,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:37:00,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:37:00,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:37:00,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:37:00,756 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand 26 states. [2020-10-29 03:37:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:37:01,254 INFO L93 Difference]: Finished difference Result 273 states and 282 transitions. [2020-10-29 03:37:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:37:01,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 153 [2020-10-29 03:37:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:37:01,257 INFO L225 Difference]: With dead ends: 273 [2020-10-29 03:37:01,257 INFO L226 Difference]: Without dead ends: 168 [2020-10-29 03:37:01,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:37:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-29 03:37:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2020-10-29 03:37:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-29 03:37:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2020-10-29 03:37:01,292 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 153 [2020-10-29 03:37:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:37:01,293 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2020-10-29 03:37:01,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:37:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2020-10-29 03:37:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-29 03:37:01,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:37:01,294 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:37:01,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 03:37:01,294 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:37:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:37:01,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1304305088, now seen corresponding path program 21 times [2020-10-29 03:37:01,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:37:01,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649031317] [2020-10-29 03:37:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:37:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:01,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:01,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:01,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:06,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:06,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-29 03:37:06,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:06,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-29 03:37:06,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:06,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 03:37:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:37:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 03:37:06,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:06,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:06,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:06,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:06,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:06,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:06,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:37:06,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:06,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:06,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:06,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:06,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:06,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-29 03:37:06,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649031317] [2020-10-29 03:37:06,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:37:06,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 03:37:06,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319341501] [2020-10-29 03:37:06,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 03:37:06,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:37:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 03:37:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:37:06,880 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 27 states. [2020-10-29 03:37:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:37:07,450 INFO L93 Difference]: Finished difference Result 283 states and 292 transitions. [2020-10-29 03:37:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:37:07,451 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 159 [2020-10-29 03:37:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:37:07,453 INFO L225 Difference]: With dead ends: 283 [2020-10-29 03:37:07,453 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 03:37:07,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:37:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 03:37:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-10-29 03:37:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-29 03:37:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2020-10-29 03:37:07,485 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2020-10-29 03:37:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:37:07,486 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2020-10-29 03:37:07,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 03:37:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2020-10-29 03:37:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-29 03:37:07,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:37:07,487 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:37:07,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 03:37:07,487 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:37:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:37:07,487 INFO L82 PathProgramCache]: Analyzing trace with hash -808520614, now seen corresponding path program 22 times [2020-10-29 03:37:07,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:37:07,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026000803] [2020-10-29 03:37:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:37:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:07,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:07,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:07,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:12,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:12,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-29 03:37:12,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:12,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 03:37:12,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:12,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:12,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:37:12,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:37:12,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:37:12,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:13,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:13,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:13,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:13,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:13,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:13,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:37:13,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:13,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:13,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:13,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:13,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:37:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-29 03:37:13,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026000803] [2020-10-29 03:37:13,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:37:13,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 03:37:13,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111086939] [2020-10-29 03:37:13,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 03:37:13,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:37:13,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 03:37:13,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:37:13,113 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand 28 states. [2020-10-29 03:37:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:37:13,752 INFO L93 Difference]: Finished difference Result 293 states and 302 transitions. [2020-10-29 03:37:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:37:13,756 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 165 [2020-10-29 03:37:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:37:13,757 INFO L225 Difference]: With dead ends: 293 [2020-10-29 03:37:13,757 INFO L226 Difference]: Without dead ends: 180 [2020-10-29 03:37:13,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:37:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-29 03:37:13,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-10-29 03:37:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-29 03:37:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2020-10-29 03:37:13,799 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 165 [2020-10-29 03:37:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:37:13,800 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2020-10-29 03:37:13,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 03:37:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2020-10-29 03:37:13,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-29 03:37:13,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:37:13,801 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:37:13,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 03:37:13,802 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:37:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:37:13,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2057654412, now seen corresponding path program 23 times [2020-10-29 03:37:13,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:37:13,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041888568] [2020-10-29 03:37:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:37:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:13,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:13,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:18,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:18,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-29 03:37:18,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:18,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-29 03:37:18,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:18,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 03:37:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:37:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 03:37:18,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:19,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:19,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:19,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:19,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:19,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:19,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:37:19,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:19,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:19,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:19,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:19,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:19,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-10-29 03:37:19,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041888568] [2020-10-29 03:37:19,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:37:19,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 03:37:19,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165098813] [2020-10-29 03:37:19,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 03:37:19,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:37:19,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 03:37:19,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:37:19,513 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 29 states. [2020-10-29 03:37:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:37:20,192 INFO L93 Difference]: Finished difference Result 303 states and 312 transitions. [2020-10-29 03:37:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:37:20,193 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 171 [2020-10-29 03:37:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:37:20,196 INFO L225 Difference]: With dead ends: 303 [2020-10-29 03:37:20,197 INFO L226 Difference]: Without dead ends: 186 [2020-10-29 03:37:20,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:37:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-29 03:37:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-10-29 03:37:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-29 03:37:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 187 transitions. [2020-10-29 03:37:20,244 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 187 transitions. Word has length 171 [2020-10-29 03:37:20,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:37:20,245 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 187 transitions. [2020-10-29 03:37:20,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 03:37:20,245 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 187 transitions. [2020-10-29 03:37:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-29 03:37:20,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:37:20,246 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:37:20,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 03:37:20,246 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:37:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:37:20,247 INFO L82 PathProgramCache]: Analyzing trace with hash 719056654, now seen corresponding path program 24 times [2020-10-29 03:37:20,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:37:20,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383851998] [2020-10-29 03:37:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:37:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:20,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:20,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:25,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:25,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-29 03:37:25,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:25,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-29 03:37:25,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:25,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:37:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-29 03:37:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 03:37:25,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:26,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:26,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:26,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:26,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:26,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:26,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:37:26,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:26,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:26,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-29 03:37:26,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383851998] [2020-10-29 03:37:26,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:37:26,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 03:37:26,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129533989] [2020-10-29 03:37:26,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 03:37:26,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:37:26,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 03:37:26,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:37:26,083 INFO L87 Difference]: Start difference. First operand 183 states and 187 transitions. Second operand 30 states. [2020-10-29 03:37:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:37:26,797 INFO L93 Difference]: Finished difference Result 313 states and 322 transitions. [2020-10-29 03:37:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:37:26,798 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 177 [2020-10-29 03:37:26,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:37:26,800 INFO L225 Difference]: With dead ends: 313 [2020-10-29 03:37:26,800 INFO L226 Difference]: Without dead ends: 192 [2020-10-29 03:37:26,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:37:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-29 03:37:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-10-29 03:37:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-29 03:37:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2020-10-29 03:37:26,832 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 177 [2020-10-29 03:37:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:37:26,832 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2020-10-29 03:37:26,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 03:37:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2020-10-29 03:37:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-29 03:37:26,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:37:26,833 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:37:26,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 03:37:26,833 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:37:26,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:37:26,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1269476568, now seen corresponding path program 25 times [2020-10-29 03:37:26,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:37:26,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972583628] [2020-10-29 03:37:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:37:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:26,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:26,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:26,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:32,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:32,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-29 03:37:32,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:32,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5280 [2020-10-29 03:37:32,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:32,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 03:37:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 03:37:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 03:37:32,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:32,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:32,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:32,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:32,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:32,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:32,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:37:32,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:32,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:32,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:32,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-10-29 03:37:32,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972583628] [2020-10-29 03:37:32,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:37:32,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 03:37:32,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277334328] [2020-10-29 03:37:32,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 03:37:32,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:37:32,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 03:37:32,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:37:32,858 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand 31 states. [2020-10-29 03:37:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:37:33,616 INFO L93 Difference]: Finished difference Result 323 states and 332 transitions. [2020-10-29 03:37:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 03:37:33,617 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 183 [2020-10-29 03:37:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:37:33,619 INFO L225 Difference]: With dead ends: 323 [2020-10-29 03:37:33,619 INFO L226 Difference]: Without dead ends: 198 [2020-10-29 03:37:33,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:37:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-29 03:37:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-10-29 03:37:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-29 03:37:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2020-10-29 03:37:33,669 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 183 [2020-10-29 03:37:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:37:33,670 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2020-10-29 03:37:33,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 03:37:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2020-10-29 03:37:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-29 03:37:33,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:37:33,671 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:37:33,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 03:37:33,672 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:37:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:37:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash 122780610, now seen corresponding path program 26 times [2020-10-29 03:37:33,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:37:33,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466042404] [2020-10-29 03:37:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:37:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:33,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:33,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:33,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 03:37:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:39,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:39,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:39,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:39,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:39,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:39,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:37:39,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:39,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:39,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:39,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:39,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:39,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-29 03:37:39,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466042404] [2020-10-29 03:37:39,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:37:39,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 03:37:39,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047666494] [2020-10-29 03:37:39,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 03:37:39,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:37:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 03:37:39,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:37:39,484 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand 32 states. [2020-10-29 03:37:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:37:40,210 INFO L93 Difference]: Finished difference Result 333 states and 342 transitions. [2020-10-29 03:37:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 03:37:40,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 189 [2020-10-29 03:37:40,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:37:40,213 INFO L225 Difference]: With dead ends: 333 [2020-10-29 03:37:40,213 INFO L226 Difference]: Without dead ends: 204 [2020-10-29 03:37:40,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:37:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-29 03:37:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2020-10-29 03:37:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-29 03:37:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2020-10-29 03:37:40,261 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 189 [2020-10-29 03:37:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:37:40,262 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2020-10-29 03:37:40,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 03:37:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2020-10-29 03:37:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-29 03:37:40,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:37:40,263 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:37:40,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 03:37:40,264 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:37:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:37:40,264 INFO L82 PathProgramCache]: Analyzing trace with hash 887294172, now seen corresponding path program 27 times [2020-10-29 03:37:40,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:37:40,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286105960] [2020-10-29 03:37:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:37:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:40,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:40,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:45,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:45,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-29 03:37:45,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:45,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 03:37:45,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:45,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 03:37:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:37:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 03:37:45,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:46,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:46,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:46,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:46,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:46,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:46,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:37:46,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:46,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:46,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:46,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:46,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:46,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2020-10-29 03:37:46,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286105960] [2020-10-29 03:37:46,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:37:46,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 03:37:46,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956980464] [2020-10-29 03:37:46,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 03:37:46,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:37:46,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 03:37:46,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:37:46,114 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand 33 states. [2020-10-29 03:37:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:37:46,935 INFO L93 Difference]: Finished difference Result 343 states and 352 transitions. [2020-10-29 03:37:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 03:37:46,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 195 [2020-10-29 03:37:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:37:46,938 INFO L225 Difference]: With dead ends: 343 [2020-10-29 03:37:46,938 INFO L226 Difference]: Without dead ends: 210 [2020-10-29 03:37:46,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:37:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-29 03:37:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-29 03:37:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-29 03:37:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2020-10-29 03:37:46,979 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 195 [2020-10-29 03:37:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:37:46,980 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2020-10-29 03:37:46,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 03:37:46,980 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2020-10-29 03:37:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-29 03:37:46,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:37:46,981 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:37:46,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 03:37:46,981 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:37:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:37:46,982 INFO L82 PathProgramCache]: Analyzing trace with hash 866425462, now seen corresponding path program 28 times [2020-10-29 03:37:46,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:37:46,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182199213] [2020-10-29 03:37:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:37:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:46,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:47,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:47,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:52,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:52,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-29 03:37:52,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:52,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5271 [2020-10-29 03:37:52,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:52,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:52,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 03:37:52,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-29 03:37:52,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 03:37:52,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:53,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:53,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:53,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:53,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:53,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:53,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:37:53,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:53,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:53,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:53,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:53,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:53,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-29 03:37:53,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182199213] [2020-10-29 03:37:53,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:37:53,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 03:37:53,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510886204] [2020-10-29 03:37:53,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 03:37:53,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:37:53,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 03:37:53,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:37:53,172 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand 34 states. [2020-10-29 03:37:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:37:54,010 INFO L93 Difference]: Finished difference Result 353 states and 362 transitions. [2020-10-29 03:37:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:37:54,014 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 201 [2020-10-29 03:37:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:37:54,015 INFO L225 Difference]: With dead ends: 353 [2020-10-29 03:37:54,015 INFO L226 Difference]: Without dead ends: 216 [2020-10-29 03:37:54,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:37:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-29 03:37:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-10-29 03:37:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-29 03:37:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2020-10-29 03:37:54,064 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 201 [2020-10-29 03:37:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:37:54,064 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2020-10-29 03:37:54,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 03:37:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2020-10-29 03:37:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-29 03:37:54,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:37:54,066 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:37:54,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 03:37:54,066 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:37:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:37:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash 431542416, now seen corresponding path program 29 times [2020-10-29 03:37:54,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:37:54,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509198270] [2020-10-29 03:37:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:37:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:54,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:54,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:54,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:59,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:59,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-29 03:37:59,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:37:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 03:37:59,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:59,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 03:37:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 03:37:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 03:37:59,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:37:59,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:37:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:37:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:37:59,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:37:59,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:37:59,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:37:59,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:37:59,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:37:59,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:37:59,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:37:59,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:37:59,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:37:59,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-10-29 03:38:00,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509198270] [2020-10-29 03:38:00,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:38:00,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 03:38:00,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220372252] [2020-10-29 03:38:00,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 03:38:00,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:00,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 03:38:00,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:38:00,010 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 35 states. [2020-10-29 03:38:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:00,871 INFO L93 Difference]: Finished difference Result 363 states and 372 transitions. [2020-10-29 03:38:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 03:38:00,872 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 207 [2020-10-29 03:38:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:00,874 INFO L225 Difference]: With dead ends: 363 [2020-10-29 03:38:00,874 INFO L226 Difference]: Without dead ends: 222 [2020-10-29 03:38:00,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:38:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-29 03:38:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2020-10-29 03:38:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-29 03:38:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 223 transitions. [2020-10-29 03:38:00,918 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 223 transitions. Word has length 207 [2020-10-29 03:38:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:00,918 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 223 transitions. [2020-10-29 03:38:00,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 03:38:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 223 transitions. [2020-10-29 03:38:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-29 03:38:00,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:00,920 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:38:00,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 03:38:00,920 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash -691385558, now seen corresponding path program 30 times [2020-10-29 03:38:00,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:00,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370309562] [2020-10-29 03:38:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:00,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:00,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:01,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking...